Sony Walkman MZ-R900 Manual de serviço - Página 39

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Sony Walkman MZ-R900 Manual de serviço
Pin No.
Pin Name
156, 157
TEST1, TEST0
158
EVA
159
NC
160
SSB DATA
161
SSB CLK
162
MCUVSS0
163
VREC PWM
164
VL PWM
165
VC PWM
SPDL AUX
166
PWM
167, 168
NC
169
CLK SEL
OPEN CLOSE
170
SW
171
GND SW
172
SET CODE0
173
SET CODE1
174, 175
SET CODE2, 3
176
MIFVDD1
177
MIFVSS1
178
AOUT SEL
179
SI0
180
SO0
181
SCK0
182
XGUM ON
183
BEEP
184
NC
185
VD SEL
186
XMUTE
187
LCD RST AUX
188, 189
NC
190
XPATCH
191
OPT DET
192
XJACK DET
193
XMIC DET
194, 195
PD S0, PD S1
196
MIFVDD2
197 to
MODE1 to 3
199
200, 201
HD CON 1, 2
202
REC WBL SW
203
XCS ADA
I/O
I
Input terminal for the main test (normally fixed at "L")
I
EVA/FLASH chip discrimination terminal "L": FLASH chip, "H": EVA chip
O
Not used (open)
I/O
Input/output of SSB serial data with RF amp (IC501)
O
SSB serial clock output to RF amp (IC501)
—
Ground terminal (for the microcomputer block)
O
Over write head control spare terminal Not used (open)
PWM for the laser automatic power supply voltage control signal output to the power control
I
(IC901)
I
PWM signal output for the system power supply voltage control to the power control (IC901)
O
PWM signal output for the spindle support to the motor driver (IC551)
O
Not used (open)
O
System clock select signal output to the power control (IC901)
Open/close detection switch (S806) of the upper panel input terminal (A/D input)
I
"L": when upper panel close
O
Control signal output to the ground (GND) changeover switch
O
Input terminal for the set (fixed at "L" except for US/Canadian)
O
Input terminal for the set (open in this set)
O
Input terminal for the set (fixed at "L" in this set)
—
Power supply terminal (for the microcomputer I/F block) (+2.3V)
—
Ground terminal (for the microcomputer I/F block)
O
HP/LINE changeover signal output to the headphone amp (IC302)
Serial data input from the nonvolatile memory (IC804) and liquid crystal display element
I
module
Serial data output to the nonvolatile memory (IC804), A/D, D/A converter (IC301) and
O
liquid crystal display element module
Serial clock signal output to the nonvolatile memory (IC804), A/D, D/A converter (IC301)
O
and liquid crystal display element module
Battery pack detection switch (S804) input terminal for the charge "L": there is battery pack
I
for the charge
O
Beep sound control signal output to the headphone amp (IC302)
O
Not used (open)
O
VD power supply changeover signal output terminal Not used (open)
Analog muting control signal output terminal to the headphone amp (IC302)
O
"L": muting ON
O
Reset control signal output terminal to the liquid crystal display element "L": reset
O
Not used (open)
I
Patch function detection input terminal "L": patch function Not used (open)
I
DIN plug detection signal input terminal
I
LINE IN plug detection signal input terminal
I
Microphone plug detection signal input terminal
O
PD IC mode changeover signal output to the optical pick up
—
Power supply terminal (for the microcomputer I/F block) (+2.3V)
Power supply control signal output (for the over write head drive) to the over write head
O
drive (IC601)
O
Over write head control signal output to the over write head drive (IC601)
O
LPF changeover switch input terminal when REC/PB control Not used (open)
O
Chip select signal output to A/D, D/A converter (IC301)
Description
MZ-R900
37